The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2021
Filed:
Mar. 23, 2020
Applicant:
Jeol Ltd., Tokyo, JP;
Inventor:
Kazuya Omoto, Tokyo, JP;
Assignee:
JEOL Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 37/05 (2006.01);
U.S. Cl.
CPC ...
H01J 37/05 (2013.01); H01J 2237/057 (2013.01);
Abstract
An energy filter has a plurality of sector magnets which are configured symmetrically with respect to a symmetry plane, and forms a real image on the symmetry plane. The energy filter include: an entrance aperture provided with a slit having a longitudinal direction in a direction perpendicular to an energy dispersion direction; and a hexapole and a quadrupole disposed on the symmetry plane.